摘要： 分析了长江航道的作用，提出了用信息化技术实现航道维护管理的目标与系统开发的任务。介绍了电子地图的特点，说明了航道维护管理信息系统的逻辑结构，以及系统的功能设计和数据组织。在应用部分介绍了系统开发的环境，说明了地图数据的制作流程，给出了系统的应用实例。最后说明了系统的应用效果与未来需完善的工作。

关键词: 电子地图；航道维护；系统设计

Abstract: This paper analyzes the function of the waterway of the Yangtze River, and proposes the target to improve the maintenance and management of the waterway using information technology, with the task to develop related system. Also the character of electronic map is introduced, and the structure of the maintenance and management information system of Yangtze waterway is presented, with the introduction of system function and the data organization. At the part of system application, it introduces the environment of system develop, and the produce flow of map data, with some examples of the system. Finally, it shows the result of the system application, and lists the future work

Key words: Electronic map; Waterway maintenance; System design